package com.lujin.eduservice.controller;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lujin.commonutils.R;
import com.lujin.eduservice.entity.EduTeacher;
import com.lujin.eduservice.entity.vo.TeacherQuery;
import com.lujin.eduservice.service.EduTeacherService;
import com.lujin.servicebase.exceptionhandler.GuliException;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author lujin
 * @since 2021-06-25
 */
@Api(description="讲师管理")
@RestController
@RequestMapping("/eduservice/teacher")
@CrossOrigin
public class EduTeacherController {
    //把service注入
    @Autowired
    private EduTeacherService teacherService;

    //1.查询讲师表所有数据
    //rest风格
    @ApiOperation(value = "所有讲师列表")
    @GetMapping("findAll")
    public R findAllTeacher(){
        //调用service方法实现查询所有的操作
        List<EduTeacher> list=teacherService.list(null);
        return R.ok().data("items",list);
    }

    //2.逻辑删除讲师的方法
    @ApiOperation(value = "逻辑删除")
    @DeleteMapping("{id}")//id值需要通过路径进行传递
    public R removeTeacher( @ApiParam(name = "id", value = "讲师ID", required = true)@PathVariable String id){//@PathVariable获取到路径中的id值
        boolean flag = teacherService.removeById(id);
        if (flag){
            return R.ok();
        }else {
            return R.error();
        }
    }


    //3.分页查询讲师的方法
    //current代表当前页，limit代表每页记录数
    @GetMapping("pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current,
                             @PathVariable long limit){
        //创建page对象
        Page<EduTeacher> pageTeacher=new Page<>(current,limit);
        //调用方法实现分页
        //调用方法时，底层封装，把分页所有数据封装到pageTeacher对象里面
        teacherService.page(pageTeacher,null);

//        try {
//            int i=4/0;
//        }catch (Exception e){
//            //执行自定义异常
//            throw new GuliException(20001,"执行了自定义异常处理...");
//        }



        long total = pageTeacher.getTotal();//总记录数
        List<EduTeacher> records = pageTeacher.getRecords();//数据list集合
//
//        Map map=new HashMap<>();
//        map.put("total",total);
//        map.put("rows",records);
//        return R.ok().data(map);

        return R.ok().data("total",total).data("rows",records);
    }

    //4.条件查询带分页的方法
    @PostMapping("pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(@PathVariable long current,
                                  @PathVariable long limit,
                                  @RequestBody(required = false) TeacherQuery teacherQuery){//require=false表示teacherQuery的值可以没有
        //创建page对象
        Page<EduTeacher> pageTeacher=new Page<>(current,limit);

        //构造条件
        QueryWrapper<EduTeacher>  wrapper=new QueryWrapper<>();
        //多条件组合查询
        //mybatis的动态sql
        String name=teacherQuery.getName();
        Integer level=teacherQuery.getLevel();
        String begin=teacherQuery.getBegin();
        String end=teacherQuery.getEnd();
        //判断条件值是否为空，如果不为空拼接条件
        if (!StringUtils.isEmpty(name)){
            wrapper.like("name",name);//column为数据库中的字段名，不是类中的属性名
        }
        if (!StringUtils.isEmpty(level)){
            wrapper.eq("level",level);
        }
        if (!StringUtils.isEmpty(begin)) {
            wrapper.ge("gmt_create", begin);
        }
        if (!StringUtils.isEmpty(end)) {
            wrapper.le("gmt_create", end);
        }

        //排序
        wrapper.orderByDesc("gmt_create");

        //调用方法实现条件查询分页
        teacherService.page(pageTeacher,wrapper);
        long total = pageTeacher.getTotal();//总记录数
        List<EduTeacher> records = pageTeacher.getRecords();//数据list集合
        return R.ok().data("total",total).data("rows",records);
    }

    //添加讲师接口方法
    @PostMapping("addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher){
        boolean save = teacherService.save(eduTeacher);
        if (save){
            return R.ok();
        }else {
            return R.error();
        }
    }

    //根据讲师id查询
    @GetMapping("getTeacher/{id}")
    public R getTeacher(@PathVariable String id){
        EduTeacher eduTeacher = teacherService.getById(id);
        return R.ok().data("teacher",eduTeacher);
    }

    //讲师修改
    @PostMapping("updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher){
        boolean flag = teacherService.updateById(eduTeacher);
        if (flag){
            return R.ok();
        }else {
            return R.error();
        }
    }
}

